查询词典 quaternary salt

TheMn complexes with internal quaternary ammonium and/or pyridinium salt, either formed in-situ or isolated, displayedsignificantly higher activities than analogous complexes and Jacobsens catalyst in theaforementioned reaction.

通过研究发现，含有分子内季铵盐和／或吡啶盐的手性吡咯烷Mn配合物，无论是原位生成的还是分离的，都比类似的配合物以及Jacobsen催化剂的活性明显高。

It was found that tribromide quaternary ammonium salt was an excellent bromide reagent, which was easy to handle and had low toxicity. The reaction can process rapidly and has high bromide rate.

研究结果表明，三溴季铵盐是一种性能优良的固体溴化剂，操作方便，对人体的危害性小，反应速度快，溴化率高。

Tribromide quaternary ammonium salt capability research

三溴季铵盐；性能；研究

A isotherm of a monolayer at air-water interface for a quaternary ammonium salt type trimeric surfactant (shortly called 12-2-12-2-12) was investigated by the Langmuir balance technology. The surface tension at collapse pressure,γ, and the molecular limited area, A, were determined and compared with the surface tension of the surfactant solution at CMC concentration,γ.

利用Langmuir膜天平研究了季铵盐三聚表面活性剂12-2-12-2-12在空气－水界面单分子膜的表面压－分子面积等温线，得到它的崩溃压对应的表面张力γ(下标 collapse)和分子极限面积A。

The optimum conditions of preparing quaternary ammonium salt of chitosan were determined as follows: the molar ratio of chitosan to glycidyl trimethyl ammonium chloride 1:3, reaction temperature 80℃and reaction time 10 h.

制备壳聚糖季铵盐的最佳反应条件为：壳(来源：A4040BC论文网www.abclunwen.com)聚糖与环氧丙基三甲基氯化铵的摩尔比为1：3、反应温度是80℃、反应时间为10小时。

It showed that the capability of flocculation of quaternary ammonium salt of alkali ligninto black acid ATT was good.

对于麦草碱木质素季胺盐，实验表明：木质素季胺盐对酸性黑ATT染料溶液的絮凝效果较好。

The decolorization rate of black acid ATT was 78% when the dosage of quaternary ammonium salt of alkali lignin was 1184.5mg/L.

当处理后木质素季胺盐为1184.5mg/L时，酸性黑ATT染料溶液脱色率为78%。

Chiral SalanCrX complexesa saturated version of SalenCr(ⅢX are designed,and in conjunction with an ionic quaternary ammonium salt or organic strong base can efficiently catalyze the asymmetric,regio-and stereoselective alternating copolymerization of CO_2 with rac-PO at mild conditions to afford isotactic-enriched polycarbonates with～95%head-to-tail linkages and moderate enantioselectivity.

本论文在Salen构型配体的基础上，设计合成了一系列手性Salan型铬配合物，并将其与季铵盐/有机强碱组成亲电-亲核双组分催化体系，在室温下可以有效的催化CO_2和环氧丙烷的不对称交替共聚反应，实现了CO_2和环氧丙烷的不对称交替共聚反应的区域和立体化学控制，得到95%的头尾连接单元和中等光学纯度(对映体过量值ee%≈70%)的全同结构的聚碳酸酯。

The preparation and application of reactive antibacterial agents, such as silicone quaternary ammonium salt, halogenated hydroxy diphenyl ether, chitosan, halamine and other kinds, etc, were introduced in detail based on the art and development trend both here and abroad.

文章针对现有反应性抗菌整理剂的国内外发展现状和趋势，详细介绍了有机硅季铵盐、卤代羟基二苯醚、壳聚糖、卤胺及其他类等反应性抗菌整理剂的制备过程和应用情况，并对其应用前景作了展望。

The dissolution mechanism of Zr-DBP crud in Na_2CO_3 solution is studied by both infrared spectrum analysis and extraction of Zr-DBP cruds by quaternary ammonium salt in Na_2CO_3 solution.

用红外光谱分析和季铵盐萃取研究了ZrDBP界面物在碳酸钠溶液中的溶解机理。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。